Which of the Following Is True of a Pictograph

Which of the following is true of a pictograph?

A) All the picture units in a pictograph should be made equal in size.
B) A pictograph is a pie chart whose slices are made of picture units.
C) A pictograph usually contains arbitrary picture units that have little or no resemblance to the items being compared.
D) A pictograph does not need a title or a caption.
E) Varying the size of the picture units in a pictograph helps compare differences effectively.